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Delay expensive functionHasImplicitReturn call

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This commit is contained in:
Anders Hejlsberg
2024-03-01 17:37:23 -08:00
parent 0dec9c67b5
commit 703253ae6b
1 changed files with 1 additions and 3 deletions
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4
src/compiler/checker.ts
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@@ -37415,13 +37415,11 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
singleReturn = func.body; // arrow function
}
else {
if (functionHasImplicitReturn(func)) return undefined;
const bailedEarly = forEachReturnStatement(func.body as Block, returnStatement => {
if (singleReturn || !returnStatement.expression) return true;
singleReturn = returnStatement.expression;
});
if (bailedEarly || !singleReturn) return undefined;
if (bailedEarly || !singleReturn || functionHasImplicitReturn(func)) return undefined;
}
return checkIfExpressionRefinesAnyParameter(singleReturn);